The impact of organic fertilizers and biodressing powder on occurence of harmful factors in spring barley
1999
Sekerova, M.
In the years of 1996 to 1998 the impact of organic fertilizers and biopreparations on occurrence of harmful factors in spring barley was tested in a field experiment in Research and Breeding Station in Borovce. Ekovert plus was applied as a biodressing powder. Trichomil biopreparation was applied to the soil to faster liquidate pathogens surviving in the soil on after-harvest remnants. As organic fertilizers, Vermihum and Superfin were used and a control variant and a fertilized variant with nitrogen-phosphor-potassium were included in the experiment. In three-year period of duration of the experiment on average, highly significantly lowest occurrence of Fusarium spp. and Pseudocercosporella herpotrichoides pathogens in the variant with biological treatment of the seed with Ekovert plus and in the variant with Trichomil for soil was found in comparison with the control and all other variants at evaluation in 32 phase DC. The impact of organic fertilizers Vermihum and Superfin on restriction of occurrence of the said pathogens also appeared highly significant in comparison with the control at evaluation in 32 phase DC. As for evaluation of number of whitened spikes due to pathogens Fusarium spp. and Pseudocercosporella herpotrichoides, highly significantly lower number of whitened spikes was found again in the variants with bio-dressing powder Ekovert plus and Trichomil for soil than in the control variant in 75 phase DC. Similar situation was with the variants with organic fertilizers Vermihum and Superfin. No differences were found between the variants at evaluation of occuerence of Erysiphe graminis and Pyrenophora teres pathogens. From the said it follows that in ecological system of spring barley cultivation and ¡n integrated way of protection it is possible to limit the occurrence of diseases communicable by soil, seed and after-harvest remnants to a great extent after the application of biopreparations and organic fertilizers
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